Buoyant drum for motor-pontoons



0.1. Du MOND. BUOYANT DRUM FOR MOTOR PONTOONS. APPLICATION FILED NOV. 19, I918 ,360, 1 01 Patented Nov. 23, 1920.

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se um nnmvr FOB, MOTQB-PONTOONS.

Specification of Letters latent. l atented NOV. 23, 1920.

Application filed lioveinber 19, 1918. Serial No. 263,183.

1 0 all whom it may concern:

Be it known that I, CHESTER insert-r Du Mono, a citizen of the United tdtates, residing at Pueblo, in the county of Colbert and State of Colorado, have invented new and useful Improvements in Buoyant Drums for Motor-Pontoons, of which the following is a specification.

This invention relates to a buoyant drum for a motor pontoon, and one object is to.

provide a drum which shall be of light construction but especially adapted to support considerable weight, and also adapted to resist strains incident to the use of the drum as a driving element, for imparting motion to the pontoon.

A further object is to provide a drum which shall be divided into compartments, and which shall be provided at the ends thereof with bracing means of novel construction and unusual efficiency.

A still further object is to providebracing means at the ends of the drum which shall comprise angle elements reversely mounted and having their arms extendin radially of the axis of the drum, the angle elements being connected by curved braces of angular cross section.

With the foregoing and other objects in view, the invention consists in the novel construction, combination and arrangement of elements hereinafter described and claimed.

In the drawings,

Figure 1 is a vertical transverse section of one of the drums, and Fig. 2 is a longitudinal section, the middle portion being broken away.

The shaft 85 of the drum carries disks 90 keyed to the shaft and reinforcing the plates 91, the latter being secured by rivets 92 to the heads of the drum, designated 89. This provision in combination with the specific interior construction of each drum hereinafter explicitly set forth, will serve to prevent the imposition of undue torsional strain on the shaft as will be readily appreciated.

It will be noted that the heads and cylindrical wall of the drum are connected by rivets or other suitable means to corner angle irons 93; also, thatangle irons 94 of general dihedral configuration are arranged against the heads, with their bights opposed to each other at opposite sides of the drum center and with their outer end portions riveted or otherwise connected in lapped relation to the angle irons The angle irons 94 are riveted. to the heads and their inwardly directed portions serve for the rivetconnection of the partitions 95, which are of the same general configuration in cross section as the angle irons 94. In combination with "the angle irons 9a and the partitions 95 1 employ short curvilinear air gle irons 96 and short curvilinear partitions 97. The angle irons 96 are riveted to the heads of the drum, and the partitions 97 are riveted to the inwardly directed portions of the said angle irons, and both the angle irons 96 and the partitions 97 are riveted at their ends to the partitions 95 and the angle irons 94. By virtue of the construction just described it will be manifest that a stiii' and strong drum is provided, and one that will not be incapacitated by the incidental formation of a puncture in any wall thereof. Should a puncture be formed in the drum only one compartment thereof will be occupied by water and this will not seriously interfere with the floatability of the drum and will not interfere materially with the floatability or the portability of the pontoon as a whole.

It will also be noticed that the adjacent reinforcing plate 91 and the adjacent head of the drum serve for the connection of the brackets bearing the sprocket gear wheel 88 by means of which the drum is driven.

In conclusion, I'would have it understood. that with a view to contributing to the 1igl1tness and buoyancy of the pontoon without seriously detracting from the stiffness and strength thereof, it is my purpose to construct such parts of the pontoon of alumi num as are suitable for the use of such ma terial.

I would further. have it understood that eachof the drums of the pontoon is provided on its perimeter with blades or paddles 99, calculated to enable the drums to take positive hold of the water and in that way contribute to the propelling capacity of the drums.

It is the intention that the partition elements shall cooperate with the other bracing elements, for maintaining the drums rigid, and that the drums shall have sufiicient buoyancy and rigidity to carry the hull above the water line, as shown in Fig. 2, when the pontoon is in motion, the drums by virtue of their rotation having a tendency are riveted to the heads and the cylindrical Wall, dihedral angle irons connected to the first-named angle irons at their ends and having their bights spaced apart in opposed relation, partitions of similar configuration riveted to the inwardly reaching portions o'fwthe dihedral angle irons, curvilinear angle irons riveted to the heads and disposed between the inner portions "of the dihedral angle 1rons, and curvilinear partitions connected tothe curvilinear angle irons and arranged between the dihedral partitions; said curvilinear angle irons and partitions being connected through the dihedral angle irons and partitions.

2. A drum for the purpose described, comprising heads and a cylindrical wall dihedral angle irons and partitions fixed in the drum curvilinear angle irons and partitions fixed in the drum and to the firstnamed angle irons and partitions, and disks and reinforcing plates fixed to the heads of the druin in combination with a shalt extending centrally through the drum and to which the disks at the ends of the drum are fixed.

In testimony whereof I ailix my signature.

CHESTER JOSEPH DU MUND. 

